I took on the 1.25, 'cuz some of the HB rigs will not have the
option to move up in power levels. Think of it this way:

1. If I'm stuck at <1 W, then I should be rewarded for same.
2. If I have the luxury to move up in power level to make a solid
contact with a section that I need then move back to <1W, I have
added a multiplier in a manner that the <1W QRPer would not have.

Think of it like this, I thought about it and I came up with it.
Right or wrong I made it up. I have to live with it. :-)